Colorado's 18th Senate district

Colorado's 18th
State Senate district
Colorado's 18th; State Senate district
Senator
	Steve Fenberg; D–Boulder
Registration	50.2% Democratic; 9.8% Republican; 38.5% No party preference
Demographics	83% White; 1% Black; 9% Hispanic; 4% Asian; 3% Other
Population (2018)	151,796
Registered voters	119,505

Colorado's 18th Senate district is one of 35 districts in the Colorado Senate. As of January 8, 2025 it is represented by Judy Amabile.^[3] It was previously represented by Democrat Steve Fenberg, the former Senate President, since 2017.^[4]

Geography

District 18 is based in the city of Boulder, also covering the outlying Boulder County communities of Lyons, Nederland, Gunbarrel, and Niwot.^[5]^[6]

The district is located almost entirely within Colorado's 2nd congressional district, with a small section extending into the 4th district. It overlaps with the 10th, 11th, 12th, and 13th districts of the Colorado House of Representatives.^[7]

Recent election results

Colorado state senators are elected to staggered four-year terms; under normal circumstances, the 18th district holds elections in presidential years.

2020

2020 Colorado State Senate election, District 18^[8]
Party		Candidate	Votes	%
	Democratic	Steve Fenberg (incumbent)	75,261	82.9
	Republican	Peg Cage	15,524	17.1
Total votes			90,785	100
	Democratic hold

2016

2016 Colorado State Senate election, District 18^[9]
Party		Candidate	Votes	%
	Democratic	Steve Fenberg	67,799	79.6
	Republican	M. Peter Spraitz	17,370	20.4
Total votes			85,169	100
	Democratic hold

2012

2012 Colorado State Senate election, District 18^[10]
Party		Candidate	Votes	%
	Democratic	Rollie Heath (incumbent)	66,619	78.3
	Republican	Barry Thoma	18,427	21.7
Total votes			85,046	100
	Democratic hold

Federal and statewide results

Year	Office	Results^[11]
2020	President	Biden 83.6 – 14.4%
2018	Governor	Polis 82.7 – 15.2%
2016	President	Clinton 78.1 – 15.2%
2014	Senate	Udall 77.5 – 19.4%
2014	Governor	Hickenlooper 75.6 – 18.1%
2012	President	Obama 76.5 – 21.0%

References

^ "State Senate District 18, CO". Census Reporter. Retrieved April 23, 2020.
^ "Total Registered Voters by State Senate District, Party, and Status" (PDF). Colorado Secretary of State. Retrieved April 23, 2020.
^ "Senator Judy Amable".
^ "Senator Stephen Fenberg". Colorado General Assembly. Retrieved April 23, 2020.
^ "Final Plans Approved by the Court". Colorado Redistricting - General Assembly. Retrieved April 23, 2020.
^ "Colorado State Senate District 18". Ballotpedia. Retrieved December 5, 2020.
^ David Jarman. "How do counties, House districts, and legislative districts all overlap?". Daily Kos. Retrieved April 23, 2020.
^ "2020 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.
^ "2016 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.
^ "2012 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.
^ "Daily Kos Elections Statewide Results by LD". Daily Kos. Retrieved April 23, 2020.

[Census-1] "State Senate District 18, CO". Census Reporter. Retrieved April 23, 2020.

[Reg-2] "Total Registered Voters by State Senate District, Party, and Status" (PDF). Colorado Secretary of State. Retrieved April 23, 2020.

[Colorado_State_Senate_District_18-3] "Senator Judy Amable".

[CO_Site-4] "Senator Stephen Fenberg". Colorado General Assembly. Retrieved April 23, 2020.

[5] "Final Plans Approved by the Court". Colorado Redistricting - General Assembly. Retrieved April 23, 2020.

[Ballotpedia-6] "Colorado State Senate District 18". Ballotpedia. Retrieved December 5, 2020.

[7] David Jarman. "How do counties, House districts, and legislative districts all overlap?". Daily Kos. Retrieved April 23, 2020.

[8] "2020 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.

[9] "2016 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.

[10] "2012 Abstract of Votes Cast" (PDF). Colorado Secretary of State. Retrieved July 24, 2022.

[11] "Daily Kos Elections Statewide Results by LD". Daily Kos. Retrieved April 23, 2020.

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